Recently there has been a flurry of activity opposing the proposed change to the disturbance limits of CISPR 22. Objections focus on proposed Power Line Telecommunications (PLT) disturbance limits, which would be relaxed by 18 dB. These disturbance limits for Power Line Telecommunications (PLT) systems are defined by the standard CISPR 22 and its European equivalent EN 55022 entitled “Information technology equipment – Radio disturbance characteristics – Limits and methods of measurement”. By way of background, a project team was formed in 2005 to explore the issue of PLT limits, and its first Committee Draft was issued in February 2008. Subsequently, only six National Committees (NCs) supported the draft while eight NCs were strongly opposed—viz., Australia, Austria, Cyprus, Denmark, Finland, South Africa, Sweden, and the United States of America. Critics have singled out what they view as flawed test methods that would boost the effective relaxation of the standard. The International Amateur Radio League is encouraging each of its national groups to write to its nation’s CISPR representative indicating opposition to the adoption of the proposed change. Further details regarding this opposition can be found online.Testing to international standards can sometimes be problematic. Clearly, any suggestion of flawed test methods provokes controversy. Remember you can always weigh in on the Interference Technology Testing Forum. Try it now.
Radio Operators Oppose Proposed Change to Disturbance Limits of CISPR 22
